Wolves manager Nuno Espirito Santo has refused to apologise for his criticism of referee Lee Mason following his side's defeat at Burnley.
Following Monday's loss, Nuno said Mason was "not good enough" to officiate at the top level, leading to the Football Association asking him to explain his comments.
"I won't apologise for my words and thoughts," Nuno said on Wednesday.
However, he told a news conference he regretted "the timing" of them.
Nuno, whose side host Tottenham in the Premier League on Sunday, added: "They were not in the best moment to come across because it could be a bad interpretation.